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DIVESTITURE OF STEM CELL ASSETS (Details) (USD $) | 12 Months Ended |  | 0 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013 Series A common stock | Oct. 02, 2013 Asset contribution agreement BioTime Contributions Asterias item | Oct. 02, 2013 Asset contribution agreement Asterias contributions BioTime | Oct. 02, 2013 Contribution Agreement Asterias contributions Geron ruling
DIVESTITURE OF STEM CELL ASSETS |  |  |  |  |
Number of rulings in favor of ViaCyte, Inc. for which the entity was substituted as a party in an appeal |  |  |  |  | 2
Amount of debt forgiven |  |  | $ 5,000,000 |  |
Shares issued |  |  | 8,902,077 | 21,773,340 | 6,537,779
Percentage ownership in Asterias |  |  |  |  | 21.40%
Percentage ownership in Asterias |  |  |  | 71.60% |
Term of warrants issued |  |  | 5 years | 3 years |
Number of warrants issued |  |  | 8,000,000 | 3,150,000 |
Exercise price of warrants issued (in dollars per share) |  |  | $ 5.00 | $ 5.00 |
Number of subsidiaries for which minority interests were contributed |  |  | 2 |  |
Carrying value of common stock |  | 0 |  |  |
Gain or loss recognized on assets surrendered | 0 |  |  |  |
Carrying value of stem cell assets | 0 |  |  |  |
Liability relating to contractual obligation to distribute common stock |  | $ 0 |  |  |

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